Disk harrow



(No ModeL) H. ARD 8; H. M, BURDIG DISK HARROW. v No. 476,435. PategnedJune -'7, 1892.

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ATTOPUNEI/T NITED STATES PATENT OFFICE.

HARRY lVIARD AND HIRAM M. BURDIOK, OF SYRACUSE, NEYV YORK.

DISK HARROW.

SPECIFICATION forming part of Letters Patent No. 476,435, dated June 7,1892.

Application filed October 22, 1891. Serial No. 409,631. (No model.)

To all whom it may concern.-

' Be it known that we, HARRY WIARD and HIRAM M. BURDICK, citizens of theUnited States, residing at Syracuse, in the county of Onondaga and Stateof New York, have invented certain new and useful Improvements in Diskl-Iarrows; and we do hereby declare the following to be a full, clear,and exact de scription of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

Our invention has for its objects, first, to provide a hinge-jointforsecuring a disk gang to the main frame, adapted to permit a verticaland horizontal movement of said gang, and also to enable the forwardcutting-edges of the inner disks of the gangs to be brought closetogether when the gangs are arranged obliquely to the line of draft;second, to construct scrapers for the disks adapted to be operatedtogether in a gang, to conform to the inequalities of their respectivedisks, and to be automatically withdrawn from the face of the disks whendesired. These objects are accomplished by the means illustrated in theaccompanying drawings, in which Figure 1 is a rear view of a disk harrowembodying our invention. Fig. 2 is a sectional rear view of a bracketsupporting one end of scraper-bar, a footlever, and a portion of agang-beam. Fig. 8 is a sectional side view of the parts shown in Fig. 2.Fig. at is a plan view of a sector-plate forming part of hingejoint.Fig. 5 is a side view of a hinge-joint which secures the disk gangs tothe main frame. Fig. 6 is a sectional side View of central piece ofhinge-joint. Fig. 7 is a vertical transverse section of the parts shownin Fig. 5. Fig. 8 is a face view of scraper with section of scraper-rodand socket-plate on gangbar. Fig. 9 is a sectional edge view of scraperwith scraper-rod, spring, and socket-plate secured to gang-bar. Fig. 10is a plan view of sliding bolt for locking foot-lever and scrapers inposition. Fig. 11 is a front view of the parts shown in Fig. 10.

As illustrated in the drawings, the main frame of the harrow consists ofa pole A, having a cross-bar B extending laterally therefrom. Aseat-standard V may, if desired, be secured to the pole A.

The disk gangs each consist of a series of cutting-disks O, mounted onan axle-rod D and separated from each other by spools E. Standards F,provided with bearing-boxes G at their lower ends and secured at theirupper ends to a gang-bar H, also form part of the disk gangs. The diskgangs are connected to the main frame byahinge-joint consisting of abase-plate K, a sector-plate L, and a central piece M. The base-plate Kis secured to the gang-beam H and is provided with vertical ears or lugs70, between which the horizontal shank of the central piece M is securedby the bolt 0, passing through said ears and shank. A vertical shank mis formed on the rear end of the central piece M to engage the sleeve Zof the sector-plate L. This sector-plate is secured to the cross-bar Band provided with a curved forward edge Z, which engages the recessedlug m, formed on the central piece M. The sector-plate is secured inposition by means of a bolt N, provided with a washer and passed throughthe vertical shank m of the central piece M. The sector-plate L ispreferably secured to the back of the cross-bar B, so that the sleeve Zand the shank m of the central piece may be arranged in rear of the diskgangs, although we do not desire to be limited to such a construction.When said parts are arranged in rear of the cross-bar and disk gangs, asshown herein, the forward cutting-edges of the inner disks of the gangsare brought close together, when the gangs are set in working positionobliquely to the line of draft, and thereby cultivate all the groundbetween said disks, whereas when those parts are arranged fartherforward the forward cutting-edges of the inner disks of the gangsseparate when the gangs are arranged obliquely to the line of draft andleave a considerable portion of the ground uncultivated.

Scrapers XV are mounted on the rod P by means of apertures 20, formed inthe scrapershanks. These apertures expand outwardly toward the concavefaces of the disks, so that said shanks may have a free rocking movementon said bar. The upper ends of the scrapers are pivoted on the gang-barsH by a universal joint formed by the socket-plates Q, engaging therounded upper end of the scrapers. Any other joint having similarcapabilities may be used, however, without departing from our invention.

Spiral springs R are secured to the bar P, so as to bear against theback of the scrapershanks, and the bar is also provided with lugs of anysuitable construction such as the pins .9, which bear against the frontof the scrapershanks. In the construction shown herein the pins 5 areextended vertically through the bar and project above and below thesame. \Vhen the scrapers are in their normal positi on, thescraping-blades are re moved from the faces of the disks and the pinsbear against the front of the scraper-shank above and below the bar P,as shown in the left disk gang herein; but when the scraping-blades arebrought in contact with the faces of the disks the scraper-shanks areinclined toward the faces of the disks and only the lower ends of thepins 8 bear against the scraper-shanks, as indicated in the right diskgang shown in the drawings.

A collar U is secured to the inner ends of the bars P and provided withalug it, (shown in Fig. 2,) which engages thelower end of the lever T,which is pivoted to the bracket T at t. The bar P is free to movelengthwise in its bearings, the outer bearing of which is formed in abackward extension P of the standard F and the inner bearing in thebracket T, which is bolted to the upper end of the inner standard F.

A lockin g device may, if desired, be secured to the gang-beam to holdthe scrapers in contact with the disks. The device shown herein consistsof a bolt J, which moves transversely of the gang-beam in a channel-ironI, and is adapted to extend out over the lever T when depressed, asshown in Fig. 10. Stops Y are secured to the cross-bar B to prevent theinner ends of the gangs from rising above a horizontal position. Thescrapers are brought in contact with the respective disks by pressingdown the foot-lever T until it assumes the position shown in the rightdisk gang in the drawings. Thelower end of the lever engaging the lug uof the collar U thereby draws the bar 1 inward bodily and inclines thescraper-shanks, as shown in said gang. The springs R are at the sametime compressed somewhat; but they may be further compressed by anyraised irregularity on the face of the disks or expand to compensate forany irregularity in the opposite direction. The

pivotal attachment of the upper end of the scrapers, together with theirloose jointed connection with the scraper-bar P, permits the shanks tomove in an axial line and the scraping-blade to move in a horizontalplane, so as to correspond with any irregularity appearing either nearthe center or outer portion of the disk, and at the same time keep itsentire scraping-edge against the face of the disk. The operator afterpressing down the lever T with the forward portion of his foot, andwhile his foot is still on the lever, may throw the bolt outward withhis heel until it overlaps the lever, and thereby prevent it fromrising, which will hold the scrapers continuously in contact with thedisks. Then the pressure is released from the foot-lever T, the spiralsprings R expand to regain their normal position, and in so doing theydraw the scraper-bar P and scraper-shanks backward. In this operationthey are aided by the lower ends of the pins 3, which are continuouslypressed against the front of the scraper-shanks below the bar P untilthe shank bears equally against said pin above and below the bar and thescrapers have regained their normal position away from the disks.

WVe do not desire to be limited to the specific construction orarrangement of the spring, the scraper-shank, and pin shown herein; butwe desire to include any equivalent construction and arrangement ofparts wherein the same spring that operates to equalize the pressure ofthe scrapers against the disks and overcome the inequalities of theirfaces also operates to bring the scrapers back from the disks when thepressure is released.

The disk gangs are adapted to move vertically, so as to enter adepression in the ground by means of the base-plate K, rocking on thehorizontal pivot O, and the vertical shank m of the central piece servesas a pivot-pin to permit the base-plate and central piece to movehorizontally, and thereby produce a similar movement of the disk gang.The recessed lug m of the central piece engaging the forward edge of thesector-plate strengthens the joint forward and prevents any strain onthe vertical pivot.

What we claim is-- 1. In a disk harrow, the combination of a main frame,disk gangs, and a hinge-joint having a base-plate, a sector-plate, and acentral piece pivoted to the base-plate by a horizontal pin and to thesector-plate by an engaging vertical shank and sleeve and provided witha recessed lug engaging the forward edge of the sector-plate,substantially as shown and described.

2. In a disk harrow, the combination, with a gang of revolving disks, ofa series of scrapers pivoted at their upper end to the gangbeam andmounted freely on a reciprocating bar provided with lugs bearing againstthe front of the scraper-shank, and spiral springs bearing against theback of said shank and adapted when compressed to adjust the scrapers toany irregularity in the faces of the disks and when relaxed to withdrawthe scrapers against the back of said scraper-shanks, subfroin thedisks, substantially as shown and stantially as shown and described.described. In testimony whereof we affix our signatures 3. In a diskharrow, the combination, with in presence of two witnesses. 5 agang ofrevolving disks, of aseries of scrapers pivoted at their upper end tothe gang- HARRY 'WIARD. beam and mounted freely on a reciprocating HIRAMM. BURDICK. rod provided with vertically-disposed pins Witnesses:

bearing against the front of the scraper-shank J. F. DRAIME,

10 below said bar, and spiral springs bearing E. BRAINARD.

